diff --git a/app/controllers/settings/profiles_controller.rb b/app/controllers/settings/profiles_controller.rb
index 2d80998968..458f4148cc 100644
--- a/app/controllers/settings/profiles_controller.rb
+++ b/app/controllers/settings/profiles_controller.rb
@@ -20,7 +20,7 @@ class Settings::ProfilesController < Settings::BaseController
   private
 
   def account_params
-    params.expect(account: [:display_name, :note, :avatar, :header, :bot, fields_attributes: [:name, :value]])
+    params.expect(account: [:display_name, :note, :avatar, :header, :bot, fields_attributes: [[:name, :value]]])
   end
 
   def set_account
diff --git a/spec/system/profile_spec.rb b/spec/system/profile_spec.rb
index a05a146fef..f9449b52c3 100644
--- a/spec/system/profile_spec.rb
+++ b/spec/system/profile_spec.rb
@@ -5,8 +5,6 @@ require 'rails_helper'
 RSpec.describe 'Profile' do
   include ProfileStories
 
-  subject { page }
-
   let(:local_domain) { Rails.configuration.x.local_domain }
 
   before do
@@ -17,7 +15,8 @@ RSpec.describe 'Profile' do
   it 'I can view public account page for Alice' do
     visit account_path('alice')
 
-    expect(subject).to have_title("alice (@alice@#{local_domain})")
+    expect(page)
+      .to have_title("alice (@alice@#{local_domain})")
   end
 
   it 'I can change my account' do
@@ -26,8 +25,31 @@ RSpec.describe 'Profile' do
     fill_in 'Display name', with: 'Bob'
     fill_in 'Bio', with: 'Bob is silent'
 
-    first('button[type=submit]').click
+    fill_in 'account_fields_attributes_0_name', with: 'Personal Website'
+    fill_in 'account_fields_attributes_0_value', with: 'https://host.example/personal'
 
-    expect(subject).to have_content 'Changes successfully saved!'
+    fill_in 'account_fields_attributes_1_name', with: 'Professional Biography'
+    fill_in 'account_fields_attributes_1_value', with: 'https://host.example/pro'
+
+    expect { submit_form }
+      .to change { bob.account.reload.display_name }.to('Bob')
+      .and(change_account_fields)
+    expect(page)
+      .to have_content 'Changes successfully saved!'
+  end
+
+  def submit_form
+    first('button[type=submit]').click
+  end
+
+  def change_account_fields
+    change { bob.account.reload.fields }
+      .from([])
+      .to(
+        contain_exactly(
+          be_a(Account::Field),
+          be_a(Account::Field)
+        )
+      )
   end
 end